Skip site navigation (1)Skip section navigation (2)
Date:      Sun, 16 Nov 1997 22:31:17 -0800 (PST)
From:      Ian Struble <ian@majesticnet.com>
To:        Amancio Hasty <hasty@rah.star-gate.com>
Cc:        current@FreeBSD.ORG, "Jordan K. Hubbard" <jkh@time.cdrom.com>
Subject:   Re: make world time???/
Message-ID:  <XFMail.971116223117.ian@majesticnet.com>
In-Reply-To: <199711170540.VAA00863@rah.star-gate.com>

next in thread | previous in thread | raw e-mail | index | archive | help
I just built a dual PP200 that I was going to burnin by doing a few dozen make
worlds on before sending it out, but alas I only had a buslogic PCI SCSI for
the system drives ;(  The I/O would have been sweet too because it has a DAC960
raid controller with 32megs of cache and 5 x 4.5gigs worth of raid 0,1 or 5.  I
was really bummed when I saw the buslogic and couldn't get my hands on a 2940. 

Actually is there even support for the Mylex RAID controllers?


Ian

On 17-Nov-97 Amancio Hasty wrote:
> Well, your worlstone time : " I shaved off 40 minutes off " is admirable
> 
> Still looking for the SMP configuration on fast disks "world stone figure"
> 
> 
>       Tnks,
>       Amancio
> 
> 
> 
>> > I do a make world in about 75 minutes -- I just didn't do profiled
>> > libraries.
>> 
>> Argh.  If we're going to compare worldstone numbers, we've really
>> got to converge on some standard for what consititutes a proper
>> one. ;-)  In my own benchmarks, I always do a completely "standard"
>> build with only one exception, which is to add CFLAGS=-O -pipe
>> to /etc/make.conf (oh yeah, /usr also mounted async).  Other
>> folks stripe /usr/obj or mount it noatime or do any number
>> of other things (like NOPROFILE) which can only skew the numbers
>> when comparing them.  Maybe the first step would be to agree
>> upon a script for launching the world build which sets various
>> environment variables consistently?  Then we'd at least be
>> down to just the I/O trickieries as variants.
>> 
>> I've definitely noticed, with my dual P6/233 (and yes Virginia,
>> it is possible to overclock a P6/180 to a P6/233 if you have
>> good fans and some luck :), that things are primarily *I/O*
>> bound, not CPU bound, with my single IBM DCAS 4.3 GB drive
>> (these are 5400 RPM and not quite speed demons).  On a
>> machine with /usr/src and /usr/obj mounted on a 5 drive
>> (Quantum 2GB) CCD array, I can shave as much as 40 minutes
>> off the world build just on a uniprocessor P6/200, which
>> is definitely food for thought.
>> 
>>                                      Jordan




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.971116223117.ian>